showuon commented on a change in pull request #11247:
URL: https://github.com/apache/kafka/pull/11247#discussion_r693315762
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File path: docs/streams/developer-guide/dsl-api.html
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@@ -1952,9 +1951,8 @@ <h4 class="anchor-heading"><a
id="streams_concepts_globalktable" class="anchor-l
</div></blockquote>
</li>
<li><p class="first">For each input
record on one side that does not have any match on the other side, the <code
class="docutils literal"><span class="pre">ValueJoiner</span></code> will be
called with <code class="docutils literal"><span
class="pre">ValueJoiner#apply(leftRecord.value,</span> <span
class="pre">null)</span></code> or
- <code class="docutils
literal"><span class="pre">ValueJoiner#apply(null,</span> <span
class="pre">rightRecord.value)</span></code>, respectively; this explains the
row with timestamp=60, timestamp=80, and timestamp=100 in the table below,
which lists <code class="docutils literal"><span class="pre">[E,</span> <span
class="pre">null]</span></code>,
- <code class="docutils
literal"><span class="pre">[F,</span> <span class="pre">null]</span></code>,
and <code class="docutils literal"><span class="pre">[null,</span> <span
class="pre">f]</span></code> in the OUTER JOIN column.
- Note that these left and right
results are emitted after the specified grace period passed.
<strong>Caution:</strong> using the deprecated <code class="docutils
literal"><span class="pre">JoinWindows.of(...).grace(...)</span></code> API
might result in eagerly emitted spurious left/right results.</p>
+ <code class="docutils
literal"><span class="pre">ValueJoiner#apply(null,</span> <span
class="pre">rightRecord.value)</span></code>, respectively; this explains the
row with timestamp=3 in the table below, which lists <code class="docutils
literal"><span class="pre">[A,</span> <span class="pre">null]</span></code> in
the OUTER JOIN column
+ (unlike LEFT JOIN, <code
class="docutils literal"><span class="pre">[null,</span> <span
class="pre">x]</span></code> is possible, too, but no such example is shown in
the table).</p>
Review comment:
This is reverted this PR: https://github.com/apache/kafka/pull/11172
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